#638A9C

RGB 99, 138, 156

Values

Hex#638A9C

RGB99, 138, 156

HSL199°, 22%, 50%

On White3.72:1

On Black5.65:1

#EFEDEB background

#2C291B ink

#638A9C accent

#5756A4 support

#C3B1B1 neutral

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Use these colors:

Background: #EFEDEB (background)
Ink: #2C291B (ink)
Accent: #638A9C (accent)
Support: #5756A4 (support)
Neutral: #C3B1B1 (neutral)

Build a design system around this color.